You want a list of way worse challenges within living memory? Because that's what you're going to get....
But World War II ended well with...the invention and use of nuclear weapons.
Against that, we have...global temperature might rise a few degrees in the next century. If some highly inaccurate computer models are right.
Sorry, folks, that doesn't even register by the standards of the 20th Century.
But we can deal with it. We are way better equipped to deal with all of these problem than we have been in all of history.
Here endeth the rant. For now.